Increased risk of tinnitus following a trigeminal neuralgia diagnosis: a one-year follow-up study

Table 3 Incidence rate, crude and adjusted hazard ratios for tinnitus among the sampled patients stratified by surgical intervention

Tinnitus occurrence over 1-year follow-up	Patients with trigeminal neuralgia who underwent surgical interventions (n = 19)		Patients with trigeminal neuralgia who did not undergo surgical interventions (n = 12,568)		Comparison groups (n = 12,587)
Tinnitus occurrence over 1-year follow-up	No.	%	No.	%	No.	%
Yes	6	31.6	2606	20.7	1556	12.4
Incidence per 100 person-years (95%CI)	38.5 (15.6 ~ 80.1)		23.6 (22.7 ~ 24.5)		13.2 (12.5 ~ 13.8)
Crude HR (95% CI)	2.91 (1.31, 6.49)**		1.78 (1.67, 1.9)***		1.00
Adjusted ^a HR (95% CI)	2.20 (0.98, 4.91)		1.68 (1.58, 1.8)***		1.00

Notes: ** indicates p < 0.01; *** indicates p < 0.001; HZ hazard ratio
^aAdjustment for patient’s sex, age, urbanization level, monthly income and geographic region, and hypertension, hyperlipidemia, coronary heart disease, diabetes, cervical spondylosis, temporomandibular joint disorders and injury to head and neck

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